872  Leg-Stamp
닭다리 개다리 2

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There are 200 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 250 heads of Chickens and Dogs together. Altogether there are 740 legs. How many chickens are there?



우리 안에 총 130 마리의 닭과 개가 있다. 다리를 세어보니, 총합쳐서 360 다리가 있다. 몇마리의 닭이 우리 안에 있는가?



There are 210 heads of Chickens and Dogs together. Altogether there are 560 legs. How many chickens are there?



There are 210 heads of Chickens and Dogs together. Altogether there are 620 legs. How many chickens are there?

There are 140 stamps which are 5-cent stamps and 4-cent stamps. Altogether they cost 630 cents. How many 5-cent stamps are there?



There are 200 stamps which are 7-cent stamps and 5-cent stamps. Altogether they cost 1240 cents. How many 7-cent stamps are there?



오늘 5원짜리 6원짜리 우표 총 190장을 사고, 1020 원을 지불 했을때, 몇개의 5원짜리 우표를 샀는가?



There are 130 stamps which are 7-cent stamps and 9-cent stamps. Altogether they cost 1030 cents. How many 7-cent stamps are there?



There are 220 stamps which are 8-cent stamps and 4-cent stamps. Altogether they cost 1400 cents. How many 8-cent stamps are there?

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